Sensitivity Analyses for Time-Domain Fatigue Life of Umbilical Bending Stiffener

Abstract

Abstract: Nonlinear characteristic of bending stiffener made from polymer is obvious and traditional fatigue analysis method in frequency domain is not applicable. Fatigue strength is the crucial and difficult aspect of bending stiffener design. Mathematical model for bending stiffener analysis was established, and fatigue analysis method of bending stiffener based on mathematical model was introduced. Fatigue analysis in time domain employs the thought from global analysis to local analysis. Then sensitivity analysis was performed to study the effects of different parameters on fatigue life of bending stiffener, and the effects of different parameters were discussed. The method proposed in this work and the conclusions can be the guide for bending stiffener of deepwater umbilical design.

Key words: umbilical, flexible riser, bending stiffener, fatigue analysis, sensitivity analysis

WANG Ai-Jun, YANG He-Zhen. Sensitivity Analyses for Time-Domain Fatigue Life of Umbilical Bending Stiffener[J]. Journal of Shanghai Jiaotong University, 2012, 46(10): 1637-1641.

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